I get asked this question a lot in my showroom. We are not a one size first all nor a one mattress works for all store. All our demo mattresses are twin size in the show room but all of our mattresses except the zoned latex support come in all the standard sizes. Twin, XL twin, double/Full, Queen, King and California king. If you would like to purchase a zoned support they only come in Double/Full, Queen and King.